added drone file

.drone.yml

@@ -0,0 +1,30 @@
+kind: pipeline
+name: meshviewer build
+
+clone:
+  depth: 50
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+  - git submodule update --recursive --init
+
+- name: build on node 12
+  image: node:12.12.0-stretch
+  commands:
+  - ls -alh
+
+# - name: backup-old-firmware
+#   image: appleboy/drone-ssh
+#   settings:
+#     host: 46.4.138.183
+#     username: fwupload
+#     key:
+#       from_secret: ssh-update
+#     port: 22
+#     command_timeout: 120m
+#     script:
+#       - ./rsync-backup.sh
+#       - rm -rf /srv/fwuploads/troisdorf/*
+